Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f17d3cdae3a75de519139641de433b4460591a570c65d68bb959e1908234cdf5' 
  AND token = '3KL6Z1uL1rhkHwseO769HeJ3CfLFX90Xpy7aLNGtHu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}